Method and System for an Adaptive Auto-Focus Algorithm
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
Jan 30, 2012
filing date -
Oct 20, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system for auto-focusing is presented that receives an image at an image capture device, determines a focus measure of the image, and adjusts a focus of the image by moving a lens in the image capture device in a first direction until a maximum focus measure position is reached. The method and system then evaluates a noise level of the focus measure and continues to adjust the focus of the image by further moving the lens in the first direction until the focus measure is decreased by an adaptive threshold amount, wherein the adaptive threshold amount is based on the noise level of the focus measure. The method and system then adjusts the focus of the image by moving the lens in a second direction to the maximum focus measure position.
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Cited Art Landscape
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